

#ifndef CTYPE_H
#define CTYPE_H

/*
 * NOTE! This ctype does not handle EOF like the standard C
 * library is required to.
 */

#define _U    0x01    /* upper */
#define _L    0x02    /* lower */
#define _D    0x04    /* digit */
#define _C    0x08    /* cntrl */
#define _P    0x10    /* punct */
#define _S    0x20    /* white space (space/lf/tab) */
#define _X    0x40    /* hex digit */
#define _SP    0x80    /* hard space (0x20) */

extern const unsigned char _ctype[];

#define __ismask(x) (_ctype[(int)(unsigned char)(x)])

#define isalnum(c)    ((__ismask(c)&(_U|_L|_D)) != 0)
#define isalpha(c)    ((__ismask(c)&(_U|_L)) != 0)
#define iscntrl(c)    ((__ismask(c)&(_C)) != 0)
#define isdigit(c)    ((__ismask(c)&(_D)) != 0)
#define isgraph(c)    ((__ismask(c)&(_P|_U|_L|_D)) != 0)
#define islower(c)    ((__ismask(c)&(_L)) != 0)
#define isprint(c)    ((__ismask(c)&(_P|_U|_L|_D|_SP)) != 0)
#define ispunct(c)    ((__ismask(c)&(_P)) != 0)
#define isspace(c)    ((__ismask(c)&(_S)) != 0)
#define isupper(c)    ((__ismask(c)&(_U)) != 0)
#define isxdigit(c)    ((__ismask(c)&(_D|_X)) != 0)

#define isascii(c) (((unsigned char)(c))<=0x7f)
#define toascii(c) (((unsigned char)(c))&0x7f)

static inline unsigned char __tolower(unsigned char c)
{
    if (isupper(c))
        c -= 'A'-'a';
    return c;
}

static inline unsigned char __toupper(unsigned char c)
{
    if (islower(c))
        c -= 'a'-'A';
    return c;
}

#define tolower(c) __tolower(c)
#define toupper(c) __toupper(c)


#endif /* CTYPE_H */
